44 results about "Shoulder surface" patented technology

A floating pin for positioning a substrate relative to a substrate support includes a shaft configured to move through a guide hole in a substrate support, and a pin head including a top surface and a flat shoulder surface disposed between the top surface and the shaft. The flat shoulder surface is configured to be seated on a recessed surface of the substrate support and seal the guide hole of the substrate support.

Provided is a compact threaded joint which has excellent sealing performance against internal pressure and sealing performance against external pressure, has excellent strength against compressive loads, and can maintain sealing performance against external pressure even when repeated loads are applied. Provided is a compact threaded joint in which external pressure seal sections (21, 31) and internal pressure seal sections (23, 33) are provided in front of and behind threaded sections (22, 32), a nose section (24) for maintaining internal pressure sealing performance is provided at the tip of a pin (2), and torque shoulder surfaces (25, 35) are provided at the tip of the nose section (24). When a compressive load is applied, a portion of the compressive load is applied by contact between the insertion surfaces of the threaded portions (22, 32). Furthermore, by reducing the shoulder angle (theta) of the torque shoulder surfaces (25, 35), the amount of press-fit of the male buckle (2) with respect to the female buckle (3) and the amount of radially inward shrinkage deformation of the opening end of the female buckle (2) when a compressive load is applied are reduced, and accumulation of damage in the vicinity of the outer sealing surface is suppressed.

The present invention discloses a medical device for applying a cinch to a suture, the medical device comprising: an elongated shaft including a proximal region and a distal region, the distal region defining a lumen, and a distally facing end surface; an outer cinch member defining a bore, and a shoulder having a proximally facing shoulder surface, wherein the outer cinch member includes a proximal portion disposed within the lumen and is releasably engaged with the distal region of the elongate shaft such that the shoulder is spaced distally from the distally facing end surface; an elongated inner shaft extending through the lumen and the bore and including a distal end section; an inner cinch member engaged with the distal end section of the elongated inner shaft, the inner cinch member configured to engage the outer cinch member and includes at least a segment configured to fit within the bore; a distally facing shear edge defined by the distal region of the elongated shaft; and a suture cutting member disposed within the lumen and including a proximally facing shear edge, the suture cutting member having an open configuration wherein the proximally facing shear edge is disposed distally of the distally facing shear edge to define an opening between the proximally facing shear edge and the distally facing shear edge, wherein the suture cutting member is designed to shift toward a closed configuration where the proximally facing shear edge has moved proximally relative to the distally facing shear edge such that the opening is closed.

The utility model relates to a double-shoulder self-sealing drilling and boring rod structure for a deep hole drill, which comprises a hollow rod body, a double-end double-shoulder external thread and a double-end double-shoulder internal thread, and the double-end double-shoulder external thread and the double-end double-shoulder internal thread are processed at two ends of the hollow rod body; the thread form is a rectangular square thread, the inner and outer thread ends adopt double shoulders, and an inner and outer thread small end sealing angle and an inner and outer thread large end sealing angle with 13-angle sealing surfaces are machined at the inner and outer thread small end and the inner and outer thread large end; the double-end double-shoulder external thread of one drilling and boring rod is screwed into the double-end double-shoulder internal thread of the other drilling and boring rod, and the whole drilling and boring rod is formed by end-to-end connection after tightening and screwing; the 13-degree sealing surfaces of the large end and the small end of the thread are attached to form an angle self-sealing surface; the rectangular threads of the drilling and boring rod transmit torque, the double-shoulder structure of the threads positions and enhances the strength of the threaded connector, the structure is simple, large torque can be transmitted, two shoulder faces can be sealed at the same time after screwing, and the problem of leakage of cooling liquid is solved.

The present invention relates to a threaded pipe connection. A threaded pipe connection comprising a tubular coupling with first and second female threaded zones formed in opposing sections; and first and second pipes, each comprising a male threaded zone and a shoulder surface at its terminal end, wherein each female threaded zone includes a female thread that tapers radially within the female threaded zone from a maximum diameter at the outer end of the female threaded zone, wherein each male threaded zone includes a male thread that tapers radially so as to reduce in diameter towards the terminal end of the pipe, wherein the threaded pipe connection is configured to enable the first and second pipes to be engaged with the tubular coupling in a made-up configuration in which: the shoulder surfaces of the first and second pipes abut; the entire male threaded zone of the first pipe engages the entire first female threaded zone; the entire male threaded zone of the second pipe engages the entire second female threaded zone; and for each of the first and second female threaded zones. The crest of one of the male and female threads radially interferes with the root of the other of the male and female threads in a first portion of the female threaded zone and does not interfere or interferes by a smaller amount in a second portion of the female threaded zone; the second portion is located at the inner end of the female threaded zone.

To provide a pneumatic tire excellent in aerodynamic performance.SOLUTION: A pneumatic tire 1 includes a tread 10, a sidewall 2, and a shoulder 4, and has an angular ground contact end shape. Each of the shoulders 4 has a shoulder front surface 26 having substantially no corner, and the shoulder front surface 26 has a curved surface 26b having an arc shape curved so as to protrude outward in the tire axial direction. The curvature radius of the curved surface 26b is, for example, not less than 5mm and not more than 15mm.SELECTED DRAWING: Figure 8

Screw nut (1) with an internal thread and two nut parts (2, 3), wherein each of the nut parts (2, 3) has a section (4, 5) of the internal thread which can be slid onto an external thread (30) in a radial direction, and wherein the nut parts (2, 3) have interoperable connecting elements which allow a relative displacement of the nut parts (2, 3) in a direction radial to the axis of the internal thread to a position in use in which the internal thread of the screw nut (1) engages the external thread (30) with minimal play, wherein the connecting elements have guide surfaces (14 - 25) which guide the nut parts (2, 3) of the screw nut (1) in a rotational movement about an axis of rotation extending transversely to the axis of the internal thread when moving into the use position, wherein each nut part (2, 3) has at least one first locking arm (10, 13) which has a guide surface (14, 17) on one side which causes the rotational movement when the nut parts (2, 3) are moved and bears against a complementary guide surface (16, 15) on a second locking arm (12, 11) of the other nut part (3, 2), and wherein the screw nut (1) in the use position of the nut parts has a shoulder surface (26) extending towards the axis of the internal thread in the region of a first end of the internal thread, characterized by the fact that the shoulder surface (26) deviates from a plane extending radially to the axis of the internal thread and is such that the radially outer region of the shoulder surface (26) with the greatest distance to the axis of the internal thread has the greatest axial distance from the second end of the internal thread and the inner region of the shoulder surface (26) with the smallest distance to the axis of the internal thread has the smallest axial distance from the second end of the internal thread.

A fluid pressure cylinder (100) is provided with a cylinder tube (10). The cylinder tube (10) has: an annular connection part (13); a welded part (14) formed between the main body part (12) and the connecting part (13), the outer peripheral surface of the connecting part (13) having: a first curved surface (13b) formed so that the diameter increases as the distance from the welded part increases; a second curved surface (13c) which is formed on the end surface (11) side of the first curved surface (13b), and which is formed so that the diameter increases as the second curved surface approaches the end surface (11); a shoulder surface (13e) formed so as to be continuous with an end surface on the end surface (11) side of the second curved surface (13c), the shoulder surface (13e) extending radially outward; a large-diameter section (13f) formed so as to be continuous with the end surface (11); and an inclined surface (13g) formed so as to straddle between the large-diameter section (13f) and the shoulder surface (13e), the radius of curvature of the first curved surface (13b) being larger than the radius of curvature of the second curved surface (13c).

The nasal spray guide may include a flange defining a lumen configured to receive the distal end of the nasal sprayer, a shoulder surface extending radially outward from the flange and angled with respect to the lumen, and a cap defining a cavity and configured to engage the shoulder such that the cavity is substantially aligned with the lumen. In some variations, a method of using the nasal spray guide includes positioning at least a portion of the nasal sprayer within the lumen such that the distal portion of the nasal sprayer is exposed, inserting the distal portion of the nasal sprayer into the user's nostril until the shoulder of the nasal spray guide seats against the user's nasal surface, and actuating the nasal sprayer while the shoulder of the nasal spray guide is seated.

The invention belongs to the technical field of tire detection, and discloses a tire part visual defect detection device and a detection method thereof.The detection device comprises a rack, and a first CCD visual detection camera used for detecting the side wall of a tire and a second CCD visual detection camera used for detecting the crown of the tire are installed on the rack; a double-layer shelf is fixedly installed in the machine frame, a rotary table used for bearing a tire is installed at the top end of the double-layer shelf, and a tire centering and rotating integrated assembly used for enabling the tire and the rotary table to be kept coaxial and driving the tire to rotate is arranged in the double-layer shelf. Tire pressing assemblies used for applying vertical loads to tires are arranged on the left side and the right side in the machine frame, a longitudinal beam is fixedly installed on the top of the machine frame, and a tire shoulder warping assembly and an angle-adjustable visual detection assembly are installed at the bottom end and the outer wall of one side of the longitudinal beam respectively. The tire side wall, the outer tire crown, the inner tire surface and the inner tire shoulder surface of the tire can be synchronously detected.

The present invention relates to a double-shouldered friction stir welding tool and a friction stir welding method, comprising a stirring head body and a stirring needle coaxially arranged at one end of the stirring head body; a static shoulder is arranged hollow along the axial direction and coaxially sleeved on the stirring head, and the shoulder surface of the static shoulder has an inclined surface; a lower shoulder is coaxially connected to the stirring needle; during friction stir welding, the stirring head, the static shoulder and the lower shoulder move along the welding trajectory, the stirring head and the lower shoulder rotate, the static shoulder does not rotate, and the axis of the stirring head forms a welding inclination angle with the normal of the workpiece to be welded. The present invention can obtain a joint with a smooth upper surface without burrs, no internal defects, small welding deformation, stable welding quality and high strength. Due to the welding inclination angle, it inherits the advantages of conventional single-shouldered friction stir welding and completely solves the bottleneck problem of conventional double-shouldered welding with unstable quality and inability to achieve engineering application. It is suitable for high-quality and stable welding of hollow profiles for rail transportation and large thin-walled parts of rocket tanks.

The present invention provides a sliding component capable of reducing damage to a sliding surface. The sliding component (1) comprises a pair of sealing rings (3, 5) arranged to rotate relative to each other, wherein a shoulder surface (9) extending in a circumferential direction capable of contacting an opposing sliding surface (S2) is formed on the sliding surface (S1) of the sealing ring (5); an inner recess (11) recessed in the axial direction and extending toward the inner diameter side and opening toward the inner diameter side; and an outer recess (12) recessed in the axial direction and extending toward the outer diameter side and opening toward the outer diameter side.

A nut is provided for mechanically interlocking a component to a t-slot frame member. The component is positionable on the t-slot frame member and the nut is receivable in a t-slot in the frame member. The nut includes first and second shoulder surfaces extending outwardly from each other and lying in a common plane. A rib projects from the first shoulder surface. A bolt extending through a bore in the component and is threadable into a threaded bore in the nut. The threading of the bolt into the threaded bore draws the first shoulder surface toward a first abutment wall defining the t-slot such that the rib engages the first abutment wall.

The present invention provides a high torsional resistance drill pipe joint for rapid make-up in ultra-deep wells, including a male threaded joint and a female threaded joint threadedly connected thereto. The size of the clearance ΔL1 from the small end of the male thread to the inner shoulder surface is increased, and the angle δ between the bearing surface and the tangent of the tooth bottom fillet is increased. The cross-sections of the inner and outer shoulders are optimized to be composed of a fillet section, a large ellipse section, a small ellipse section, a fillet section and a straight line section, and the inner and outer shoulder surfaces are designed to be inclined. The step surfaces of the male and female joints are optimized. An elliptical stress relief groove is provided on the male joint. In addition, the thread pitches on both sides of the thread engagement section are increased. This solution achieves stiffness matching while achieving the purpose of eliminating high stress areas and enhancing sealing, improves the stress distribution on the thread teeth and the stress concentration at the inner and outer shoulder threads during male and female thread engagement, optimizes the bearing capacity distribution of the engaged threads, speeds up the make-up and break-out speed of the thread joint, improves the torsional resistance strength and sealing performance of the drill string thread joint, and prevents secondary make-up accidents.

The present invention discloses a segmented machining method for a large four-lobe shell workpiece, which includes rough milling the horizontal middle planes of four sub-shells respectively and milling the reference plane; fixing the two sub-shells on the same side of the vertical middle plane in a circular manner and finishing the vertical middle plane and the vertical end face; assembling and fixing the two sub-shells on the same side of the horizontal middle plane and finishing the horizontal middle plane, the bearing seat, the vertical end face and the reference inner hole of the vertical end face; clamping and fixing the two sub-shells on the same side of the vertical middle plane on the workbench respectively and precision turning the vertical end face, the inner hole and the inner hole shoulder face; fixing the two sub-shells on the lower side of the horizontal middle plane by closing them together left and right, assembling the four sub-shells with the fixed seats respectively, hoisting the two sub-shells on the upper side of the horizontal middle plane to the upper part of the corresponding sub-shells respectively and fixing them in a circular manner. The present invention effectively reduces the machining height and makes full use of the existing machining equipment.

This tool is a friction stir welding tool that uses frictional heat generated by high-speed rotation to soften and stir metal materials to weld them together. It features two scroll grooves on the shoulder surface, and a conical probe with a screw-like spiral groove and a flat surface that divides the spiral groove in three places. The tip of the probe also has three notches, each of which is configured as an inclined surface relative to the end face of the probe when viewed from the side.

The present invention provides a friction stir welding tool, a friction stir welding apparatus, and a friction stir welding method. The friction stir welding tool includes: a shoulder having a shoulder surface that contacts a workpiece; and a probe that protrudes from the shoulder and is rotatable about a first axis. On the outer peripheral surface of the probe, a spiral groove portion and a chamfered portion are alternately formed in the circumferential direction of the probe. When the rotation direction of the probe is defined as a first rotation direction, the spiral groove portion has a plurality of grooves that approach the shoulder surface as they face the first rotation direction. An inclined surface is formed on a part of the end surface of the tip portion of the probe, and the inclined surface is connected to the chamfered portion and approaches the shoulder surface as it faces the first rotation direction.

The invention discloses a machining method for reducing deformation of seat parts through low-stress cutting machining, and belongs to the technical field of seat part cutting. The method comprises the following steps that firstly, before the seat part is machined, a blank of the seat part is subjected to strict tempering treatment; secondly, an inner hole and a boss of the seat part are turned through a numerical control lathe, in order to remarkably increase the contact area of the bottom face of the seat part, the shoulder face of the seat part serves as a positioning reference, a multi-point limiting clamp is adopted for limiting the seat part, symmetry and uniformity of stress points on the two sides of the seat part are guaranteed, and the seat part is machined; and then the pneumatic pressing plate is used for carrying out clamping and pressing operation with low pressing force on the part. And thirdly, the cutting parameters of the part are solidified, and the cutting force, the cutting speed, the feeding amount of each tooth and the cutting depth are set. According to the invention, the problems of part deformation and dimensional accuracy caused by the influence of clamping pressure after milling can be effectively controlled, and meanwhile, the clamping efficiency is greatly improved.

The application provides a coupling for a pump, comprising a driving flange, a driven flange, and a plurality of sets of stepped shoulder nesting structures arranged between the driving flange and the driven flange; the stepped shoulder nesting structure comprises a groove and a convex shaft; the groove adopts a structure with a gradually reduced inner diameter to form a shoulder surface; an outer bag is arranged in the groove, and the outer bag is filled with a solidifiable fluid; the convex shaft can be inserted into the groove, abut against the shoulder surface, and press the outer bag; a reserved cavity is formed on the outer end surface of the convex shaft, and a probe is slidably inserted into the reserved cavity; the probe can pierce the outer bag to make the fluid overflow and solidify, forming a filler filling the space between the outer end surface of the convex shaft and the groove bottom. The coupling for the pump provided by the application can change the curved contact between the outer edge of the convex shaft and the shoulder surface into the surface contact between the outer end surface of the convex shaft and the filler, thereby expanding the contact area, reducing the wear phenomenon of the shoulder surface, and improving the structural stability in the continuous use scenario of the pump body.

The application discloses a stepped shaft shoulder punching equipment, which comprises two top plates and a side plate. A fixed cross and a movable cross are arranged between the two top plates. The fixed cross is fixedly connected with the side plate. The movable cross is located between the fixed cross and the shoulder surface of the stepped shaft to be machined and is movably connected with the side plate. A pressing device is installed between the fixed cross and the movable cross. The pressing device is used for driving the movable cross to axially move along the side plate and gradually approach the shoulder surface. An axially extending drill bit is installed on the plate surface of the movable cross towards the shoulder surface. The top end of the drill bit is hingedly connected with the movable cross. The end of the drill bit is tightly pressed against the shoulder surface. A driving device is installed on the fixed cross. The driving device drives the drill bit to rotate through a transmission device. The driving device and the drill bit are radially staggered, so that the drill bit can approach the central shaft and interference between the driving device and the central shaft is avoided. The drill bit can directly drill on the shoulder surface, work efficiency is improved, and machining precision is improved.

A static sealing device for a wheel hub assembly of a vehicle,. The wheel hub assembly includes a rolling bearing and a constant velocity joint, the rolling bearing having a radially outer ring, a radially inner ring, and an insert ring mounted on the radially inner ring and including an annular shoulder surface. The static sealing device includes a foam annular gasket formed directly in place on the annular shoulder surface such that it is integrally fixed to the annular shoulder surface, and a tubular element straddling the insert ring and the constant velocity joint and having a first end in direct contact with the foam annular gasket. Also a rolling bearing including the static sealing device.

The invention discloses a transmission shaft water cap double-shoulder taper threaded connector. A transmission shaft is in threaded connection with a water cap, a connecting thread of the transmission shaft and the water cap is a buttress taper thread, and a guide surface angle beta of the buttress taper thread is larger than a bearing surface angle alpha; the buttress taper threads are interference fit threads; the buttress taper thread connection adopts a double-shoulder structure of a main shoulder surface and an auxiliary shoulder surface, and the main shoulder surface and the auxiliary shoulder surface both adopt a sealing structure in which a boss is matched with a groove; the main shoulder face is perpendicular to the axis of the buttress taper thread, and an included angle is formed between the auxiliary shoulder face and the cross section of the buttress taper thread. The transmission shaft has the beneficial effects that the structural design is reasonable, and the transmission shaft adopts the inclined ladder double-shoulder high-bending-resistance special screwed joint, so that the transmission shaft has higher torsional strength and bending strength; the contact area of the special-shaped shoulders is increased, and the friction torque between threaded surfaces is reduced; due to the roundabout path of the special-shaped shoulder, the sealing performance of the conical surface seal is improved; and the service life of the transmission shaft under large torque is prolonged.

The invention relates to a solenoid valve and a shock absorber. A solenoid valve includes: an electromagnetic actuator; the pilot valve comprises a pilot valve seat and a pilot valve body, and the pilot valve body is provided with an annular shoulder surface; the emergency operation assembly comprises an emergency operation armature, a sleeve and an elastic piece, the emergency operation armature is in a ring shape, the sleeve is arranged in the emergency operation armature in a sleeved mode, and the electromagnetic actuator is constructed to exert lifting-off force deviating from the pilot valve seat in the axial direction on the emergency operation armature when powered on and exert lifting-off force deviating from the pilot valve seat in the axial direction on the emergency operation armature when powered off. When the electromagnetic actuator is powered off, the sleeve at least abuts against the radial inner edge area of the annular shoulder surface under the pretightening force effect of the elastic piece, the pilot valve element is made to abut against the pilot valve seat, and when the electromagnetic actuator is powered on, the pilot valve element is made to abut against the pilot valve seat under the lifting-off force effect. The emergency operation armature drives the sleeve to lift away from the surface of the annular shoulder against the pre-tightening force.

The invention relates to a device for stabilizing, immobilizing, and / or fixing a patient's head in a fixing position, comprising two holding cushions and a fixing belt, wherein in the fixing position a first holding cushion is arranged on a first side of the head and a second holding cushion is arranged on an opposite side of the head, wherein the fixing belt fixes the head in a tensioned position between the holding cushions against lifting off the support, wherein the first holding cushion and / or the second holding cushion has on the front side a first belt guide aligned in a first thickness direction of the first holding cushion and / or a second belt guide aligned in a second thickness direction of the second holding cushion,wherein the first belt guide and / or the second belt guide is arranged at a distance from the shoulder side of the respective support cushion and thus the fixing belt can be fixed by means of the respective belt guide at the distance from the shoulder surface in such a way that the fixing belt is arranged at the distance above the shoulder on the patient's head with at least one shoulder surface resting on a shoulder of the patient.

The invention discloses a threaded joint screwing method based on finite elements, which comprises the following steps of: establishing pre-processing files of three parts of threads, sealing surfaces and shoulder surfaces which are different in size and deviation combination, are respectively positioned on an internal threaded joint and an external threaded joint and are matched with each other in batches through a program, submitting finite element calculation in batches, and obtaining post-processing data in batches; and drawing a plurality of screwing curve graphs of different sizes and deviation combinations according to the screwing-in angle and the torque data point calculated according to the post-processing data, respectively obtaining the inflection point torque and the screwing yield torque on each screwing curve graph according to the plurality of screwing curve graphs, and finally synthesizing the torque results of each curve to recommend the optimal screwing torque. According to the Abaqus-based batch finite element pre-treatment and post-treatment method, batch finite element analysis can be performed on various specifications, deviation and load combinations in the research and development stage, or batch finite element evaluation can be performed on the measurement size of a product, so that the performance of the oil casing screwed joint can be comprehensively known.

The invention provides a sliding component capable of reducing damage of a sliding surface. In a sliding member (1) in which a pair of seal rings (3, 5) are arranged so as to rotate relative to each other, a sliding surface (S1) of each seal ring (5) has formed thereon: a shoulder surface (9) that extends in the circumferential direction so as to be able to come into contact with an opposing sliding surface (S2); a recessed section (11) that is recessed in the axial direction, extends to the inner diameter side, and opens to the inner diameter side; and an outer recess (12) that is recessed in the axial direction, extends to the outer diameter side, and opens to the outer diameter side.

A sealing device (5) for a rolling bearing (1) includes an annular support (8) and an elastomeric element (9) integral with the annular support. A radially outer edge (10) of the elastomeric element mates with an outer ring (2). A radially inner edge (11) of the elastomeric element mates with a shoulder surface (15) of an annular sealing seat (13) of the inner ring (3). An annular sealing lip (20) shaped substantially in the form of a sleeve axially protrudes only from a front face (21) directed towards the inside of the bearing (1) of a flange-shaped radial arm (16). The radial arm radially protrudes with respect to the annular support (8) from a root portion (22) of the radially inner edge. The elastomeric element has an axial overhang (24) which protrudes from the front face along an axial extension approximately equal to that of the annular sealing lip.

The utility model discloses a kind of earth road shoulder leveling devices, it is related to earth road shoulder leveling equipment technical field, including scraping flat plate group, the scraping flat plate group is installed on connecting frame, the connecting frame is installed on the mechanical arm of walking machine, the lower edge of the scraping flat plate group is used to scrape flat earth road shoulder surface, one side of the scraping flat plate group is equipped with first calibration support, first calibration rod is connected on the first calibration support, the first calibration rod can be moved up and down on the first calibration support, the lower end of the first calibration rod can be contacted with road surface. The utility model is contacted with road surface by first calibration rod, so that the height of scraping plate group can be calibrated, so that it can be scraped flat along the expected height to the earth material on earth road shoulder surface.

The invention belongs to the technical field of drill rod threads, and particularly relates to a drill rod thread capable of improving bearing capacity distribution in the thread tooth generatrix direction and a drill rod thereof.The drill rod thread comprises an external thread connector and an internal thread connector, and the external thread connector comprises an external thread connector body; one end of the external thread joint main body is connected with a drill rod, and the other end of the external thread joint main body is sequentially provided with an external thread joint main shoulder surface, an external thread joint taper pipe thread and an external thread joint auxiliary shoulder surface which are matched with the internal thread joint; and a main shoulder root groove is formed between the main shoulder surface of the external thread joint and the taper pipe thread of the external thread joint. The circular bead structure is changed into the main shoulder root groove, and the maximum stress value point of the external thread is transferred to the main shoulder root from the first ring tooth root at the thread connection part, so that the stress value of the main shoulder side root of the external thread can be effectively reduced, the stress concentration is reduced, and the service life of the thread tooth is prolonged.